linux-kernel - Re: [PATCH] x86/cpuid: Deal with broken firmware once more

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Date:   Thu, 10 Nov 2016 18:15:26 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Boris Ostrovsky <boris.ostrovsky@...cle.com>
cc:     "Charles (Chas) Williams" <ciwillia@...cade.com>,
        "M. Vefa Bicakci" <m.v.b@...box.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        "x86@...nel.org" <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Borislav Petkov <bp@...en8.de>,
        David Vrabel <david.vrabel@...rix.com>,
        Juergen Gross <jgross@...e.com>
Subject: Re: [PATCH] x86/cpuid: Deal with broken firmware once more

On Thu, 10 Nov 2016, Boris Ostrovsky wrote:
> On 11/10/2016 10:05 AM, Charles (Chas) Williams wrote:
> For Xen, we recently added a6a198bc60e6 ("xen/x86: Update topology map
> for PV VCPUs") to at least temporarily work around some topology map
> problems that PV guests have with RAPL (which I think is what Vefa's
> problem was).

RAPL is just the messenger and it could be any other facility relying on
the package map information. The underlying root cause is something
else. See the other mail.

Thanks,

	tglx